Morse creator put off about vote (6)
I believe the answer is:
dexter
'morse creator' is the definition.
(Colin Dexter, creator of Inspector Morse)
'put off about vote' is the wordplay.
'put off' becomes 'deter' (I've seen this before).
'about' is an insertion indicator.
'vote' becomes 'x' (how votes are marked).
'deter' going around 'x' is 'DEXTER'.
(Other definitions for dexter that I've seen before include "breed of cattle from Ireland" , "Colin -, Inspector Morse author" , "Colin --, detective writer" , "On the right-hand side in heraldry" , "Crime writer" .)